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Cowpea (Vigna unguiculata) Control in Soybean (Glycine max) With Acifluorfen, Chlorimuron, and Thiameturon

Published online by Cambridge University Press:  12 June 2017

James D. Jones ,
Billy J. Gossett ,
James R. Harris  and
Joe E. Toler
James D. Jones
Affiliation:
Agron. Dep., and Instr., Exp. Stat. Dep., Clemson Univ., Clemson, SC 29634-0359
Billy J. Gossett
Affiliation:
Agron. Dep., and Instr., Exp. Stat. Dep., Clemson Univ., Clemson, SC 29634-0359
James R. Harris
Affiliation:
Agron. Dep., and Instr., Exp. Stat. Dep., Clemson Univ., Clemson, SC 29634-0359
Joe E. Toler
Affiliation:
Agron. Dep., and Instr., Exp. Stat. Dep., Clemson Univ., Clemson, SC 29634-0359
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Abstract

Acifluorfen, chlorimuron, and thiameturon were compared in single and sequential treatments for cowpea control in soybean. Chlorimuron applied once at 8.8 g ai/ha at 14, 21, and 28 days after cowpea emergence controlled 80% or more of cowpea. Control was greater at 14 and 21 than at 28 days after emergence in one of three experiments. Cowpea control by chlorimuron was similar with single and sequential treatments. Soybean injury was lower, and soybean seed yields generally were higher with chlorimuron than with thiameturon or acifluorfen. Thiameturon and acifluorfen controlled less than 60% of cowpea. Three weedy cowpea cultivars responded the same to chlorimuron, but cowpea recovery was substantial in 1 of 3 yr.

Keywords

Acifluorfen, 5-[2-chloro-4-(trifluoromethyl)phenoxy]-2-nitrobenzoic acidchlorimuron, 2-[[[[(4-chloro-6-methoxy-2-pyrimidinyl)amino]carbonyl]amino]sulfonyl]benzoic acidthiameturon, 3-[[[[(4-methoxy-6-methyl-1,3,5-triazin-2-yl)amino]carbonyl]amino]sulfonyl]-2-thiophenecarboxylic acidcowpea, Vigna unguiculata (L.)Walp. ♯3 VIGSIsoybean, Glycine max (L.)Merr. ‘Deltapine 105’Sequential herbicide applicationsweed growth stages
Type
Research
Information
Weed Technology , Volume 3 , Issue 3 , September 1989 , pp. 518 - 522
Copyright
Copyright © 1989 by the Weed Science Society of America 

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